TM9-4110-254-14
4-28.
HOURMETER M1 TESTING AND REPLACEMENT.
This task covers a Testing b. Removal c Installation
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Lock Washers (2)
disconnected.
Self Locking Nuts (2)
Control box cover door raised and latched.
Marker tags (2)
General Safety Instructions
WARNING
High voltage and exposed rotating parts are
used in the refrigeration unit. Personal injury
can result if power is connected.
a.
(1) Be sure power has been disconnected at the source and remove two bolts (1) and lock washers (2). Open
control panel (3). Discard lock washers.
(2) Using multimeter set to measure continuity, check hourmeter (4) continuity between terminals 1 to 2.
Continuity should be indicated. If no continuity was indicated, replace hourmeter.
(3)
If no failure was indicated, close control panel (3). Install two new lock washers (2) and bolts (1).
b.
Removal.
(1) Be sure power has been disconnected at the source and remove two bolts (1) and lock washers (2). Open
control panel (3) . Discard lock washers.
NOTE
Terminal hardware is supplied with hourmeter.
(2)
Tag wire leads (5) and remove two screws (6), lock washers (7), and wire leads.
(3)
Remove two self locking nuts (8), bolts (9), and hourmeter (4). Discard self locking nuts.
c.
Installation.
(1)
Install hourmeter (4), two bolts (9), and new self locking nuts (8).
(2) Using tags and wiring diagram (fig. 1-4), install wire leads (5), two lock washers (7), and screws (6). Remove
tags.
(3)
Close control panel (3) Install two new lock washers (2) and bolts (1).
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